Technical Product Specification

Power Sub-System Intel
®
Server Chassis H2000 Family TPS
Revision 1.0
Intel order number: G59059-001
24
Table 27. PSON# Signal Characteristics.
Signal Type
Accepts an open collector/drain input from the system. Pull-up
to VSB located in power supply.
PSON
#
= Low
ON
PSON
#
= High or Open
OFF
MIN
MAX
Logic level low (power supply ON)
0V
1.0V
Logic level high (power supply OFF)
2.0V
3.46V
Source current, Vpson = low
4mA
Power up delay: T
pson_on_delay
5msec
400msec
PWOK delay: T
pson_pwok
50msec
3.5.2 PWOK(power good) Output Signal
PWOK is a power OK signal and will be pulled HIGH by the power supply to indicate that all the
outputs are within the regulation limits of the power supply. When any output voltage falls below
regulation limits or when AC power has been removed for a time sufficiently long so that power
supply operation is no longer guaranteed, PWOK will be de-asserted to a LOW state. See the
table below for a representation of the timing characteristics of PWOK. The start of the PWOK
delay time shall inhibited as long as any power supply output is in current limit.
Table 28. PWOK Signal Characteristics
Signal Type
PWOK = High
Power OK
PWOK = Low
Power Not OK
MIN
MAX
Logic level low voltage, Isink=400uA
0V
0.4V
Logic level high voltage, Isource=200A
2.4V
3.46V
Sink current, PWOK = low
400uA
Source current, PWOK = high
2mA
PWOK delay: Tpwok_on
100ms
1000ms
PWOK rise and fall time
100sec
Power down delay: T pwok_off
1ms
200msec
3.5.3 SMBAlert# Signal
This signal indicates that the power supply is experiencing a problem that the user should
investigate. This shall be asserted due to Critical events or Warning events. The signal shall
activate in the case of critical component temperature reached a warning threshold, general
failure, over-current, over-voltage, under-voltage, failed fan. This signal may also indicate the
power supply is reaching its end of life or is operating in an environment exceeding the
specified limits.
This signal is to be asserted in parallel with LED turning solid Amber or blink Amber.